Kyle Myers, or "FPS Russia" to his 4 million YouTube fans, recently showed up in an official FBI bulletin about extremist threats. Myers is well-known for speaking in a Russian accent while shooting big guns and making bigger explosions in videos he produces.

The March 5 intelligence bulletin obtained by Public Intelligence, was sent out to law enforcement agencies to warn of exploding targets being potentially used in improvised explosive devices (IED).

"The FBI assesses with high confidence recreationally used exploding targets ... can be used as an explosive for illicit purposes by criminals and extremists and explosive precursor chemicals (EPCs) present in ETs [and] can be combined with other materials to manufacture explosives for use in improvised explosive devices (IEDs)," the bulletin reads.